What I have been saying for the last eight months: "Right now we only have ad-hoc measures to determine online reputations: LinkedIn’s recommendations, Twitter users’ following:followers ratio, third-party influence measurements a la Topsy, and raw friend/follower/connection counts. That last is the crudest and least useful, which is why Facebook itself isn’t really built for reputation measurement. Quora, however, is a serious contender, if they get their PeopleRank algorithm right." (TechCrunch)
See this Amp at http://bit.ly/gM3z2n
